Final answer:
The best explanation for why the evidence in the text is a fallacy is that the speaker uses an ad hominem argument by attacking the opponent's honesty and character instead of addressing the trade policies.
Step-by-step explanation:
The statement in the debate speech is an example of a logical fallacy because the speaker uses an ad hominem argument. An ad hominem argument attacks a person's character or behavior rather than focusing on the argument or issues at hand. In this case, the speaker attacks the opponent's honesty and accuses them of spending taxpayer money on nice dinners, instead of addressing the actual trade policies or providing evidence to support the claim that the current situation is 'unacceptable' and that their plan would put the country 'back on the right track'.